Commit | Line | Data |
---|---|---|
3ee86942 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
faf2c9d7 | 21 | #include <string.h> |
3ee86942 | 22 | #include <stdio.h> |
faf2c9d7 | 23 | |
a0599745 MD |
24 | #include "libguile/_scm.h" |
25 | #include "libguile/chars.h" | |
7c33806a | 26 | #include "libguile/root.h" |
a0599745 | 27 | #include "libguile/strings.h" |
1afff620 | 28 | #include "libguile/deprecation.h" |
a0599745 | 29 | #include "libguile/validate.h" |
c829a427 | 30 | #include "libguile/dynwind.h" |
1afff620 | 31 | |
0f2d19dd JB |
32 | \f |
33 | ||
34 | /* {Strings} | |
35 | */ | |
36 | ||
3ee86942 MV |
37 | |
38 | /* Stringbufs | |
39 | * | |
40 | * XXX - keeping an accurate refcount during GC seems to be quite | |
41 | * tricky, so we just keep score of whether a stringbuf might be | |
42 | * shared, not wether it definitely is. | |
43 | * | |
44 | * The scheme I (mvo) tried to keep an accurate reference count would | |
45 | * recount all strings that point to a stringbuf during the mark-phase | |
46 | * of the GC. This was done since one cannot access the stringbuf of | |
47 | * a string when that string is freed (in order to decrease the | |
48 | * reference count). The memory of the stringbuf might have been | |
49 | * reused already for something completely different. | |
50 | * | |
51 | * This recounted worked for a small number of threads beating on | |
52 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
53 | * I couldn't figure out what went wrong, so I used the conservative | |
54 | * approach implemented below. | |
55 | * | |
56 | * A stringbuf needs to know its length, but only so that it can be | |
57 | * reported when the stringbuf is freed. | |
58 | * | |
59 | * Stringbufs (and strings) are not stored very compactly: a stringbuf | |
60 | * has room for about 2*sizeof(scm_t_bits)-1 bytes additional | |
61 | * information. As a compensation, the code below is made more | |
62 | * complicated by storing small strings inline in the double cell of a | |
63 | * stringbuf. So we have fixstrings and bigstrings... | |
64 | */ | |
65 | ||
66 | #define STRINGBUF_F_SHARED 0x100 | |
67 | #define STRINGBUF_F_INLINE 0x200 | |
68 | ||
69 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
70 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
71 | #define STRINGBUF_INLINE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_INLINE) | |
72 | ||
73 | #define STRINGBUF_OUTLINE_CHARS(buf) ((char *)SCM_CELL_WORD_1(buf)) | |
74 | #define STRINGBUF_OUTLINE_LENGTH(buf) (SCM_CELL_WORD_2(buf)) | |
75 | #define STRINGBUF_INLINE_CHARS(buf) ((char *)SCM_CELL_OBJECT_LOC(buf,1)) | |
76 | #define STRINGBUF_INLINE_LENGTH(buf) (((size_t)SCM_CELL_WORD_0(buf))>>16) | |
77 | ||
78 | #define STRINGBUF_CHARS(buf) (STRINGBUF_INLINE (buf) \ | |
79 | ? STRINGBUF_INLINE_CHARS (buf) \ | |
80 | : STRINGBUF_OUTLINE_CHARS (buf)) | |
81 | #define STRINGBUF_LENGTH(buf) (STRINGBUF_INLINE (buf) \ | |
82 | ? STRINGBUF_INLINE_LENGTH (buf) \ | |
83 | : STRINGBUF_OUTLINE_LENGTH (buf)) | |
84 | ||
85 | #define STRINGBUF_MAX_INLINE_LEN (3*sizeof(scm_t_bits)) | |
86 | ||
87 | #define SET_STRINGBUF_SHARED(buf) \ | |
88 | (SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED)) | |
89 | ||
90 | #if SCM_DEBUG | |
91 | static size_t lenhist[1001]; | |
92 | #endif | |
93 | ||
94 | static SCM | |
95 | make_stringbuf (size_t len) | |
0f2d19dd | 96 | { |
3ee86942 MV |
97 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
98 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
99 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
100 | has been changed for scm_i_symbol_chars, this null-termination | |
101 | can be dropped. | |
102 | */ | |
103 | ||
104 | #if SCM_DEBUG | |
105 | if (len < 1000) | |
106 | lenhist[len]++; | |
107 | else | |
108 | lenhist[1000]++; | |
109 | #endif | |
0f2d19dd | 110 | |
3ee86942 MV |
111 | if (len <= STRINGBUF_MAX_INLINE_LEN-1) |
112 | { | |
113 | return scm_double_cell (STRINGBUF_TAG | STRINGBUF_F_INLINE | (len << 16), | |
114 | 0, 0, 0); | |
115 | } | |
116 | else | |
117 | { | |
118 | char *mem = scm_gc_malloc (len+1, "string"); | |
119 | mem[len] = '\0'; | |
120 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) mem, | |
121 | (scm_t_bits) len, (scm_t_bits) 0); | |
122 | } | |
123 | } | |
e53cc817 | 124 | |
fd0a5bbc HWN |
125 | /* Return a new stringbuf whose underlying storage consists of the LEN octets |
126 | pointed to by STR. */ | |
127 | SCM_C_INLINE SCM | |
128 | scm_i_take_stringbufn (char *str, size_t len) | |
129 | { | |
130 | scm_gc_register_collectable_memory (str, len, "stringbuf"); | |
131 | ||
132 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) str, | |
133 | (scm_t_bits) len, (scm_t_bits) 0); | |
134 | } | |
135 | ||
3ee86942 MV |
136 | SCM |
137 | scm_i_stringbuf_mark (SCM buf) | |
138 | { | |
139 | return SCM_BOOL_F; | |
140 | } | |
1bbd0b84 | 141 | |
3ee86942 MV |
142 | void |
143 | scm_i_stringbuf_free (SCM buf) | |
0f2d19dd | 144 | { |
3ee86942 MV |
145 | if (!STRINGBUF_INLINE (buf)) |
146 | scm_gc_free (STRINGBUF_OUTLINE_CHARS (buf), | |
147 | STRINGBUF_OUTLINE_LENGTH (buf) + 1, "string"); | |
148 | } | |
bd9e24b3 | 149 | |
9de87eea | 150 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 151 | |
3ee86942 MV |
152 | /* Copy-on-write strings. |
153 | */ | |
bd9e24b3 | 154 | |
3ee86942 | 155 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 156 | |
3ee86942 MV |
157 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
158 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
159 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 160 | |
3ee86942 MV |
161 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
162 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
163 | ||
164 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
165 | ||
ed35de72 MV |
166 | /* Read-only strings. |
167 | */ | |
168 | ||
169 | #define RO_STRING_TAG (scm_tc7_string + 0x200) | |
170 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) | |
171 | ||
e1b29f6a MV |
172 | /* Mutation-sharing substrings |
173 | */ | |
174 | ||
175 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
176 | ||
177 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
178 | /* START and LENGTH as for STRINGs. */ | |
179 | ||
180 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
181 | ||
3ee86942 MV |
182 | SCM |
183 | scm_i_make_string (size_t len, char **charsp) | |
184 | { | |
185 | SCM buf = make_stringbuf (len); | |
186 | SCM res; | |
187 | if (charsp) | |
188 | *charsp = STRINGBUF_CHARS (buf); | |
189 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
190 | (scm_t_bits)0, (scm_t_bits) len); | |
191 | return res; | |
0f2d19dd JB |
192 | } |
193 | ||
3ee86942 MV |
194 | static void |
195 | validate_substring_args (SCM str, size_t start, size_t end) | |
196 | { | |
197 | if (!IS_STRING (str)) | |
198 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
199 | if (start > STRING_LENGTH (str)) | |
200 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
201 | if (end > STRING_LENGTH (str) || end < start) | |
202 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
203 | } | |
0f2d19dd | 204 | |
e1b29f6a MV |
205 | static inline void |
206 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
207 | { | |
208 | *start = STRING_START (*str); | |
209 | if (IS_SH_STRING (*str)) | |
210 | { | |
211 | *str = SH_STRING_STRING (*str); | |
212 | *start += STRING_START (*str); | |
213 | } | |
214 | *buf = STRING_STRINGBUF (*str); | |
215 | } | |
216 | ||
3ee86942 MV |
217 | SCM |
218 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 219 | { |
e1b29f6a MV |
220 | SCM buf; |
221 | size_t str_start; | |
222 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 223 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 224 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 225 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 226 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
227 | (scm_t_bits)str_start + start, |
228 | (scm_t_bits) end - start); | |
0f2d19dd JB |
229 | } |
230 | ||
ed35de72 MV |
231 | SCM |
232 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
233 | { | |
234 | SCM buf; | |
235 | size_t str_start; | |
236 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 237 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
ed35de72 | 238 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 239 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
ed35de72 MV |
240 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), |
241 | (scm_t_bits)str_start + start, | |
242 | (scm_t_bits) end - start); | |
243 | } | |
244 | ||
3ee86942 MV |
245 | SCM |
246 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
247 | { | |
248 | size_t len = end - start; | |
edea856c | 249 | SCM buf, my_buf; |
e1b29f6a MV |
250 | size_t str_start; |
251 | get_str_buf_start (&str, &buf, &str_start); | |
edea856c | 252 | my_buf = make_stringbuf (len); |
e1b29f6a MV |
253 | memcpy (STRINGBUF_CHARS (my_buf), |
254 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
3ee86942 MV |
255 | scm_remember_upto_here_1 (buf); |
256 | return scm_double_cell (STRING_TAG, SCM_UNPACK(my_buf), | |
257 | (scm_t_bits)0, (scm_t_bits) len); | |
258 | } | |
0f2d19dd | 259 | |
e1b29f6a MV |
260 | SCM |
261 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
262 | { | |
263 | if (start == 0 && end == STRING_LENGTH (str)) | |
264 | return str; | |
265 | else | |
266 | { | |
267 | size_t len = end - start; | |
268 | if (IS_SH_STRING (str)) | |
269 | { | |
270 | start += STRING_START (str); | |
271 | str = SH_STRING_STRING (str); | |
272 | } | |
273 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
274 | (scm_t_bits)start, (scm_t_bits) len); | |
275 | } | |
276 | } | |
277 | ||
3ee86942 MV |
278 | SCM |
279 | scm_c_substring (SCM str, size_t start, size_t end) | |
280 | { | |
281 | validate_substring_args (str, start, end); | |
282 | return scm_i_substring (str, start, end); | |
283 | } | |
ee149d03 | 284 | |
ed35de72 MV |
285 | SCM |
286 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
287 | { | |
288 | validate_substring_args (str, start, end); | |
289 | return scm_i_substring_read_only (str, start, end); | |
290 | } | |
291 | ||
0f2d19dd | 292 | SCM |
3ee86942 | 293 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 294 | { |
3ee86942 MV |
295 | validate_substring_args (str, start, end); |
296 | return scm_i_substring_copy (str, start, end); | |
297 | } | |
298 | ||
3ee86942 MV |
299 | SCM |
300 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
301 | { | |
302 | validate_substring_args (str, start, end); | |
303 | return scm_i_substring_shared (str, start, end); | |
304 | } | |
0f2d19dd | 305 | |
ee149d03 | 306 | SCM |
3ee86942 | 307 | scm_i_string_mark (SCM str) |
ee149d03 | 308 | { |
3ee86942 MV |
309 | if (IS_SH_STRING (str)) |
310 | return SH_STRING_STRING (str); | |
311 | else | |
312 | return STRING_STRINGBUF (str); | |
ee149d03 JB |
313 | } |
314 | ||
3ee86942 MV |
315 | void |
316 | scm_i_string_free (SCM str) | |
317 | { | |
318 | } | |
36284627 | 319 | |
3ee86942 MV |
320 | /* Internal accessors |
321 | */ | |
322 | ||
323 | size_t | |
324 | scm_i_string_length (SCM str) | |
0f2d19dd | 325 | { |
3ee86942 | 326 | return STRING_LENGTH (str); |
0f2d19dd JB |
327 | } |
328 | ||
3ee86942 MV |
329 | const char * |
330 | scm_i_string_chars (SCM str) | |
331 | { | |
332 | SCM buf; | |
e1b29f6a MV |
333 | size_t start; |
334 | get_str_buf_start (&str, &buf, &start); | |
3ee86942 MV |
335 | return STRINGBUF_CHARS (buf) + start; |
336 | } | |
b00418df | 337 | |
3ee86942 | 338 | char * |
ed35de72 | 339 | scm_i_string_writable_chars (SCM orig_str) |
b00418df | 340 | { |
ed35de72 | 341 | SCM buf, str = orig_str; |
e1b29f6a | 342 | size_t start; |
ed35de72 | 343 | |
e1b29f6a | 344 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
345 | if (IS_RO_STRING (str)) |
346 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
347 | ||
9de87eea | 348 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
349 | if (STRINGBUF_SHARED (buf)) |
350 | { | |
351 | /* Clone stringbuf. For this, we put all threads to sleep. | |
352 | */ | |
353 | ||
354 | size_t len = STRING_LENGTH (str); | |
355 | SCM new_buf; | |
356 | ||
9de87eea | 357 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
358 | |
359 | new_buf = make_stringbuf (len); | |
360 | memcpy (STRINGBUF_CHARS (new_buf), | |
361 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
362 | ||
363 | scm_i_thread_put_to_sleep (); | |
364 | SET_STRING_STRINGBUF (str, new_buf); | |
365 | start -= STRING_START (str); | |
366 | SET_STRING_START (str, 0); | |
367 | scm_i_thread_wake_up (); | |
368 | ||
369 | buf = new_buf; | |
370 | ||
9de87eea | 371 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
372 | } |
373 | ||
374 | return STRINGBUF_CHARS (buf) + start; | |
b00418df DH |
375 | } |
376 | ||
3ee86942 MV |
377 | void |
378 | scm_i_string_stop_writing (void) | |
379 | { | |
9de87eea | 380 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 381 | } |
b00418df | 382 | |
3ee86942 MV |
383 | /* Symbols. |
384 | ||
385 | Basic symbol creation and accessing is done here, the rest is in | |
386 | symbols.[hc]. This has been done to keep stringbufs and the | |
387 | internals of strings and string-like objects confined to this file. | |
388 | */ | |
389 | ||
390 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
391 | ||
392 | SCM | |
6869328b MV |
393 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
394 | unsigned long hash, SCM props) | |
3ee86942 MV |
395 | { |
396 | SCM buf; | |
397 | size_t start = STRING_START (name); | |
398 | size_t length = STRING_LENGTH (name); | |
399 | ||
400 | if (IS_SH_STRING (name)) | |
401 | { | |
402 | name = SH_STRING_STRING (name); | |
403 | start += STRING_START (name); | |
404 | } | |
405 | buf = SYMBOL_STRINGBUF (name); | |
406 | ||
407 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
408 | { | |
409 | /* reuse buf. */ | |
9de87eea | 410 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 411 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 412 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
413 | } |
414 | else | |
415 | { | |
416 | /* make new buf. */ | |
417 | SCM new_buf = make_stringbuf (length); | |
418 | memcpy (STRINGBUF_CHARS (new_buf), | |
419 | STRINGBUF_CHARS (buf) + start, length); | |
420 | buf = new_buf; | |
421 | } | |
6869328b | 422 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
423 | (scm_t_bits) hash, SCM_UNPACK (props)); |
424 | } | |
425 | ||
fd0a5bbc HWN |
426 | SCM |
427 | scm_i_c_make_symbol (const char *name, size_t len, | |
428 | scm_t_bits flags, unsigned long hash, SCM props) | |
429 | { | |
430 | SCM buf = make_stringbuf (len); | |
431 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
432 | ||
433 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), | |
434 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
435 | } | |
436 | ||
437 | /* Return a new symbol that uses the LEN bytes pointed to by NAME as its | |
438 | underlying storage. */ | |
439 | SCM | |
440 | scm_i_c_take_symbol (char *name, size_t len, | |
441 | scm_t_bits flags, unsigned long hash, SCM props) | |
442 | { | |
443 | SCM buf = scm_i_take_stringbufn (name, len); | |
444 | ||
445 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), | |
446 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
447 | } | |
448 | ||
3ee86942 MV |
449 | size_t |
450 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 451 | { |
3ee86942 | 452 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
453 | } |
454 | ||
3ee86942 MV |
455 | const char * |
456 | scm_i_symbol_chars (SCM sym) | |
457 | { | |
458 | SCM buf = SYMBOL_STRINGBUF (sym); | |
459 | return STRINGBUF_CHARS (buf); | |
460 | } | |
1cc91f1b | 461 | |
3ee86942 MV |
462 | SCM |
463 | scm_i_symbol_mark (SCM sym) | |
0f2d19dd | 464 | { |
3ee86942 MV |
465 | scm_gc_mark (SYMBOL_STRINGBUF (sym)); |
466 | return SCM_CELL_OBJECT_3 (sym); | |
0f2d19dd JB |
467 | } |
468 | ||
3ee86942 MV |
469 | void |
470 | scm_i_symbol_free (SCM sym) | |
471 | { | |
472 | } | |
0f2d19dd | 473 | |
be54b15d | 474 | SCM |
3ee86942 | 475 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 476 | { |
3ee86942 | 477 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 478 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 479 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 480 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
481 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
482 | (scm_t_bits)start, (scm_t_bits) end - start); | |
483 | } | |
be54b15d | 484 | |
3ee86942 MV |
485 | /* Debugging |
486 | */ | |
be54b15d | 487 | |
3ee86942 | 488 | #if SCM_DEBUG |
be54b15d | 489 | |
3ee86942 MV |
490 | SCM scm_sys_string_dump (SCM); |
491 | SCM scm_sys_symbol_dump (SCM); | |
492 | SCM scm_sys_stringbuf_hist (void); | |
be54b15d | 493 | |
3ee86942 MV |
494 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, |
495 | (SCM str), | |
496 | "") | |
497 | #define FUNC_NAME s_scm_sys_string_dump | |
498 | { | |
499 | SCM_VALIDATE_STRING (1, str); | |
500 | fprintf (stderr, "%p:\n", str); | |
501 | fprintf (stderr, " start: %u\n", STRING_START (str)); | |
502 | fprintf (stderr, " len: %u\n", STRING_LENGTH (str)); | |
503 | if (IS_SH_STRING (str)) | |
504 | { | |
505 | fprintf (stderr, " string: %p\n", SH_STRING_STRING (str)); | |
506 | fprintf (stderr, "\n"); | |
507 | scm_sys_string_dump (SH_STRING_STRING (str)); | |
508 | } | |
509 | else | |
510 | { | |
511 | SCM buf = STRING_STRINGBUF (str); | |
512 | fprintf (stderr, " buf: %p\n", buf); | |
513 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
514 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
515 | fprintf (stderr, " flags: %x\n", (SCM_CELL_WORD_0 (buf) & 0x300)); | |
516 | } | |
517 | return SCM_UNSPECIFIED; | |
518 | } | |
519 | #undef FUNC_NAME | |
520 | ||
521 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, | |
522 | (SCM sym), | |
523 | "") | |
524 | #define FUNC_NAME s_scm_sys_symbol_dump | |
525 | { | |
526 | SCM_VALIDATE_SYMBOL (1, sym); | |
527 | fprintf (stderr, "%p:\n", sym); | |
528 | fprintf (stderr, " hash: %lu\n", scm_i_symbol_hash (sym)); | |
529 | { | |
530 | SCM buf = SYMBOL_STRINGBUF (sym); | |
531 | fprintf (stderr, " buf: %p\n", buf); | |
532 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
533 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
534 | fprintf (stderr, " shared: %u\n", STRINGBUF_SHARED (buf)); | |
535 | } | |
536 | return SCM_UNSPECIFIED; | |
537 | } | |
538 | #undef FUNC_NAME | |
539 | ||
540 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, | |
541 | (void), | |
542 | "") | |
e1b29f6a | 543 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
544 | { |
545 | int i; | |
546 | for (i = 0; i < 1000; i++) | |
547 | if (lenhist[i]) | |
548 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
549 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
550 | return SCM_UNSPECIFIED; | |
be54b15d DH |
551 | } |
552 | #undef FUNC_NAME | |
553 | ||
3ee86942 MV |
554 | #endif |
555 | ||
556 | \f | |
557 | ||
558 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
559 | (SCM obj), | |
560 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
561 | #define FUNC_NAME s_scm_string_p | |
562 | { | |
563 | return scm_from_bool (IS_STRING (obj)); | |
564 | } | |
565 | #undef FUNC_NAME | |
566 | ||
567 | ||
568 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
569 | ||
570 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
571 | (SCM chrs), | |
572 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
573 | "Return a newly allocated string composed of the arguments,\n" | |
574 | "@var{chrs}.") | |
575 | #define FUNC_NAME s_scm_string | |
576 | { | |
577 | SCM result; | |
578 | size_t len; | |
579 | char *data; | |
580 | ||
581 | { | |
582 | long i = scm_ilength (chrs); | |
583 | ||
584 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); | |
585 | len = i; | |
586 | } | |
587 | ||
588 | result = scm_i_make_string (len, &data); | |
d2e53ed6 | 589 | while (len > 0 && scm_is_pair (chrs)) |
3ee86942 MV |
590 | { |
591 | SCM elt = SCM_CAR (chrs); | |
592 | ||
593 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); | |
594 | *data++ = SCM_CHAR (elt); | |
595 | chrs = SCM_CDR (chrs); | |
596 | len--; | |
597 | } | |
598 | if (len > 0) | |
599 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
d2e53ed6 | 600 | if (!scm_is_null (chrs)) |
3ee86942 MV |
601 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
602 | ||
603 | return result; | |
604 | } | |
605 | #undef FUNC_NAME | |
be54b15d | 606 | |
3b3b36dd | 607 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 608 | (SCM k, SCM chr), |
0d26a824 MG |
609 | "Return a newly allocated string of\n" |
610 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
611 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
9401323e | 612 | "of the @var{string} are unspecified.") |
1bbd0b84 | 613 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 614 | { |
3ee86942 MV |
615 | return scm_c_make_string (scm_to_size_t (k), chr); |
616 | } | |
617 | #undef FUNC_NAME | |
618 | ||
619 | SCM | |
620 | scm_c_make_string (size_t len, SCM chr) | |
621 | #define FUNC_NAME NULL | |
622 | { | |
623 | char *dst; | |
624 | SCM res = scm_i_make_string (len, &dst); | |
cb0d8be2 | 625 | |
e11e83f3 MV |
626 | if (!SCM_UNBNDP (chr)) |
627 | { | |
3ee86942 MV |
628 | SCM_VALIDATE_CHAR (0, chr); |
629 | memset (dst, SCM_CHAR (chr), len); | |
0f2d19dd | 630 | } |
e11e83f3 MV |
631 | |
632 | return res; | |
0f2d19dd | 633 | } |
1bbd0b84 | 634 | #undef FUNC_NAME |
0f2d19dd | 635 | |
3b3b36dd | 636 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
637 | (SCM string), |
638 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 639 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 640 | { |
d1ca2c64 | 641 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 642 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 643 | } |
1bbd0b84 | 644 | #undef FUNC_NAME |
0f2d19dd | 645 | |
3ee86942 MV |
646 | size_t |
647 | scm_c_string_length (SCM string) | |
648 | { | |
649 | if (!IS_STRING (string)) | |
650 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
651 | return STRING_LENGTH (string); | |
652 | } | |
653 | ||
bd9e24b3 | 654 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 655 | (SCM str, SCM k), |
0d26a824 MG |
656 | "Return character @var{k} of @var{str} using zero-origin\n" |
657 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 658 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 659 | { |
a55c2b68 | 660 | unsigned long idx; |
bd9e24b3 | 661 | |
d1ca2c64 | 662 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
663 | idx = scm_to_unsigned_integer (k, 0, scm_i_string_length (str)-1); |
664 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
0f2d19dd | 665 | } |
1bbd0b84 | 666 | #undef FUNC_NAME |
0f2d19dd | 667 | |
3ee86942 MV |
668 | SCM |
669 | scm_c_string_ref (SCM str, size_t p) | |
670 | { | |
671 | if (p >= scm_i_string_length (str)) | |
672 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
673 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
674 | } | |
f0942910 | 675 | |
3b3b36dd | 676 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 677 | (SCM str, SCM k, SCM chr), |
0d26a824 MG |
678 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
679 | "an unspecified value. @var{k} must be a valid index of\n" | |
680 | "@var{str}.") | |
1bbd0b84 | 681 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 682 | { |
a55c2b68 MV |
683 | unsigned long idx; |
684 | ||
f0942910 | 685 | SCM_VALIDATE_STRING (1, str); |
3ee86942 | 686 | idx = scm_to_unsigned_integer (k, 0, scm_i_string_length(str)-1); |
34d19ef6 | 687 | SCM_VALIDATE_CHAR (3, chr); |
3ee86942 MV |
688 | { |
689 | char *dst = scm_i_string_writable_chars (str); | |
690 | dst[idx] = SCM_CHAR (chr); | |
691 | scm_i_string_stop_writing (); | |
692 | } | |
0f2d19dd JB |
693 | return SCM_UNSPECIFIED; |
694 | } | |
1bbd0b84 | 695 | #undef FUNC_NAME |
0f2d19dd | 696 | |
3ee86942 MV |
697 | void |
698 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
699 | { | |
700 | if (p >= scm_i_string_length (str)) | |
701 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
702 | { | |
703 | char *dst = scm_i_string_writable_chars (str); | |
704 | dst[p] = SCM_CHAR (chr); | |
705 | scm_i_string_stop_writing (); | |
706 | } | |
707 | } | |
0f2d19dd | 708 | |
3b3b36dd | 709 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
710 | (SCM str, SCM start, SCM end), |
711 | "Return a newly allocated string formed from the characters\n" | |
712 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
713 | "ending with index @var{end} (exclusive).\n" | |
714 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
715 | "exact integers satisfying:\n\n" | |
716 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 717 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 718 | { |
3ee86942 | 719 | size_t len, from, to; |
685c0d71 | 720 | |
d1ca2c64 | 721 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
722 | len = scm_i_string_length (str); |
723 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 724 | if (SCM_UNBNDP (end)) |
3ee86942 | 725 | to = len; |
a55c2b68 | 726 | else |
3ee86942 MV |
727 | to = scm_to_unsigned_integer (end, from, len); |
728 | return scm_i_substring (str, from, to); | |
0f2d19dd | 729 | } |
1bbd0b84 | 730 | #undef FUNC_NAME |
0f2d19dd | 731 | |
ed35de72 MV |
732 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
733 | (SCM str, SCM start, SCM end), | |
734 | "Return a newly allocated string formed from the characters\n" | |
735 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
736 | "ending with index @var{end} (exclusive).\n" | |
737 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
738 | "exact integers satisfying:\n" | |
739 | "\n" | |
740 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
741 | "\n" | |
742 | "The returned string is read-only.\n") | |
743 | #define FUNC_NAME s_scm_substring_read_only | |
744 | { | |
745 | size_t len, from, to; | |
746 | ||
747 | SCM_VALIDATE_STRING (1, str); | |
748 | len = scm_i_string_length (str); | |
749 | from = scm_to_unsigned_integer (start, 0, len); | |
750 | if (SCM_UNBNDP (end)) | |
751 | to = len; | |
752 | else | |
753 | to = scm_to_unsigned_integer (end, from, len); | |
754 | return scm_i_substring_read_only (str, from, to); | |
755 | } | |
756 | #undef FUNC_NAME | |
757 | ||
3ee86942 MV |
758 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
759 | (SCM str, SCM start, SCM end), | |
760 | "Return a newly allocated string formed from the characters\n" | |
761 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
762 | "ending with index @var{end} (exclusive).\n" | |
763 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
764 | "exact integers satisfying:\n\n" | |
765 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
766 | #define FUNC_NAME s_scm_substring_copy | |
767 | { | |
e1b29f6a MV |
768 | /* For the Scheme version, START is mandatory, but for the C |
769 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
770 | rationale. | |
771 | */ | |
772 | ||
773 | size_t from, to; | |
3ee86942 MV |
774 | |
775 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
776 | scm_i_get_substring_spec (scm_i_string_length (str), |
777 | start, &from, end, &to); | |
3ee86942 MV |
778 | return scm_i_substring_copy (str, from, to); |
779 | } | |
780 | #undef FUNC_NAME | |
781 | ||
782 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
783 | (SCM str, SCM start, SCM end), | |
784 | "Return string that indirectly refers to the characters\n" | |
785 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
786 | "ending with index @var{end} (exclusive).\n" | |
787 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
788 | "exact integers satisfying:\n\n" | |
789 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
790 | #define FUNC_NAME s_scm_substring_shared | |
791 | { | |
792 | size_t len, from, to; | |
793 | ||
794 | SCM_VALIDATE_STRING (1, str); | |
795 | len = scm_i_string_length (str); | |
796 | from = scm_to_unsigned_integer (start, 0, len); | |
797 | if (SCM_UNBNDP (end)) | |
798 | to = len; | |
799 | else | |
800 | to = scm_to_unsigned_integer (end, from, len); | |
801 | return scm_i_substring_shared (str, from, to); | |
802 | } | |
803 | #undef FUNC_NAME | |
685c0d71 | 804 | |
3b3b36dd | 805 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 806 | (SCM args), |
0d26a824 MG |
807 | "Return a newly allocated string whose characters form the\n" |
808 | "concatenation of the given strings, @var{args}.") | |
1bbd0b84 | 809 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
810 | { |
811 | SCM res; | |
1be6b49c | 812 | size_t i = 0; |
c829a427 MV |
813 | SCM l, s; |
814 | char *data; | |
af45e3b0 DH |
815 | |
816 | SCM_VALIDATE_REST_ARGUMENT (args); | |
d2e53ed6 | 817 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
818 | { |
819 | s = SCM_CAR (l); | |
820 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
3ee86942 | 821 | i += scm_i_string_length (s); |
c829a427 | 822 | } |
3ee86942 | 823 | res = scm_i_make_string (i, &data); |
d2e53ed6 | 824 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 | 825 | { |
edea856c | 826 | size_t len; |
c829a427 | 827 | s = SCM_CAR (l); |
3ee86942 | 828 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 829 | len = scm_i_string_length (s); |
3ee86942 MV |
830 | memcpy (data, scm_i_string_chars (s), len); |
831 | data += len; | |
c829a427 MV |
832 | scm_remember_upto_here_1 (s); |
833 | } | |
0f2d19dd JB |
834 | return res; |
835 | } | |
1bbd0b84 | 836 | #undef FUNC_NAME |
0f2d19dd | 837 | |
c829a427 MV |
838 | int |
839 | scm_is_string (SCM obj) | |
840 | { | |
3ee86942 | 841 | return IS_STRING (obj); |
c829a427 | 842 | } |
24933780 | 843 | |
c829a427 MV |
844 | SCM |
845 | scm_from_locale_stringn (const char *str, size_t len) | |
846 | { | |
847 | SCM res; | |
848 | char *dst; | |
4d4528e7 | 849 | |
c829a427 MV |
850 | if (len == (size_t)-1) |
851 | len = strlen (str); | |
3ee86942 | 852 | res = scm_i_make_string (len, &dst); |
c829a427 MV |
853 | memcpy (dst, str, len); |
854 | return res; | |
855 | } | |
4d4528e7 | 856 | |
c829a427 MV |
857 | SCM |
858 | scm_from_locale_string (const char *str) | |
4d4528e7 | 859 | { |
c829a427 MV |
860 | return scm_from_locale_stringn (str, -1); |
861 | } | |
4d4528e7 | 862 | |
c829a427 MV |
863 | SCM |
864 | scm_take_locale_stringn (char *str, size_t len) | |
865 | { | |
48ddf0d9 KR |
866 | SCM buf, res; |
867 | ||
c829a427 | 868 | if (len == (size_t)-1) |
48ddf0d9 | 869 | len = strlen (str); |
c829a427 MV |
870 | else |
871 | { | |
48ddf0d9 KR |
872 | /* Ensure STR is null terminated. A realloc for 1 extra byte should |
873 | often be satisfied from the alignment padding after the block, with | |
874 | no actual data movement. */ | |
875 | str = scm_realloc (str, len+1); | |
876 | str[len] = '\0'; | |
c829a427 | 877 | } |
c829a427 | 878 | |
fd0a5bbc | 879 | buf = scm_i_take_stringbufn (str, len); |
3ee86942 | 880 | res = scm_double_cell (STRING_TAG, |
48ddf0d9 KR |
881 | SCM_UNPACK (buf), |
882 | (scm_t_bits) 0, (scm_t_bits) len); | |
c829a427 MV |
883 | return res; |
884 | } | |
885 | ||
48ddf0d9 KR |
886 | SCM |
887 | scm_take_locale_string (char *str) | |
888 | { | |
889 | return scm_take_locale_stringn (str, -1); | |
890 | } | |
891 | ||
c829a427 MV |
892 | char * |
893 | scm_to_locale_stringn (SCM str, size_t *lenp) | |
894 | { | |
895 | char *res; | |
896 | size_t len; | |
4d4528e7 | 897 | |
3ee86942 | 898 | if (!scm_is_string (str)) |
c829a427 | 899 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 | 900 | len = scm_i_string_length (str); |
c829a427 | 901 | res = scm_malloc (len + ((lenp==NULL)? 1 : 0)); |
3ee86942 | 902 | memcpy (res, scm_i_string_chars (str), len); |
c829a427 MV |
903 | if (lenp == NULL) |
904 | { | |
905 | res[len] = '\0'; | |
906 | if (strlen (res) != len) | |
907 | { | |
908 | free (res); | |
909 | scm_misc_error (NULL, | |
910 | "string contains #\\nul character: ~S", | |
911 | scm_list_1 (str)); | |
912 | } | |
913 | } | |
914 | else | |
4d4528e7 | 915 | *lenp = len; |
24933780 | 916 | |
c829a427 MV |
917 | scm_remember_upto_here_1 (str); |
918 | return res; | |
4d4528e7 | 919 | } |
af68e5e5 | 920 | |
c829a427 MV |
921 | char * |
922 | scm_to_locale_string (SCM str) | |
923 | { | |
924 | return scm_to_locale_stringn (str, NULL); | |
925 | } | |
af68e5e5 | 926 | |
c829a427 MV |
927 | size_t |
928 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
929 | { | |
930 | size_t len; | |
931 | ||
3ee86942 | 932 | if (!scm_is_string (str)) |
c829a427 | 933 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 MV |
934 | len = scm_i_string_length (str); |
935 | memcpy (buf, scm_i_string_chars (str), (len > max_len)? max_len : len); | |
c829a427 MV |
936 | scm_remember_upto_here_1 (str); |
937 | return len; | |
938 | } | |
af68e5e5 | 939 | |
3ee86942 MV |
940 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
941 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
942 | SCM | |
943 | scm_makfromstrs (int argc, char **argv) | |
944 | { | |
945 | int i = argc; | |
946 | SCM lst = SCM_EOL; | |
947 | if (0 > i) | |
948 | for (i = 0; argv[i]; i++); | |
949 | while (i--) | |
950 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
951 | return lst; | |
952 | } | |
953 | ||
c829a427 MV |
954 | /* Return a newly allocated array of char pointers to each of the strings |
955 | in args, with a terminating NULL pointer. */ | |
956 | ||
957 | char ** | |
958 | scm_i_allocate_string_pointers (SCM list) | |
af68e5e5 | 959 | { |
c829a427 MV |
960 | char **result; |
961 | int len = scm_ilength (list); | |
962 | int i; | |
963 | ||
964 | if (len < 0) | |
965 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
966 | ||
661ae7ab | 967 | scm_dynwind_begin (0); |
c829a427 MV |
968 | |
969 | result = (char **) scm_malloc ((len + 1) * sizeof (char *)); | |
970 | result[len] = NULL; | |
661ae7ab | 971 | scm_dynwind_unwind_handler (free, result, 0); |
c829a427 MV |
972 | |
973 | /* The list might be have been modified in another thread, so | |
974 | we check LIST before each access. | |
975 | */ | |
d2e53ed6 | 976 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 MV |
977 | { |
978 | result[i] = scm_to_locale_string (SCM_CAR (list)); | |
979 | list = SCM_CDR (list); | |
980 | } | |
981 | ||
661ae7ab | 982 | scm_dynwind_end (); |
c829a427 | 983 | return result; |
af68e5e5 | 984 | } |
e53cc817 | 985 | |
c829a427 MV |
986 | void |
987 | scm_i_free_string_pointers (char **pointers) | |
988 | { | |
989 | int i; | |
990 | ||
991 | for (i = 0; pointers[i]; i++) | |
992 | free (pointers[i]); | |
993 | free (pointers); | |
994 | } | |
24933780 | 995 | |
6f14f578 MV |
996 | void |
997 | scm_i_get_substring_spec (size_t len, | |
998 | SCM start, size_t *cstart, | |
999 | SCM end, size_t *cend) | |
1000 | { | |
1001 | if (SCM_UNBNDP (start)) | |
1002 | *cstart = 0; | |
1003 | else | |
1004 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
1005 | ||
1006 | if (SCM_UNBNDP (end)) | |
1007 | *cend = len; | |
1008 | else | |
1009 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
1010 | } | |
1011 | ||
3ee86942 MV |
1012 | #if SCM_ENABLE_DEPRECATED |
1013 | ||
556d75db MV |
1014 | /* When these definitions are removed, it becomes reasonable to use |
1015 | read-only strings for string literals. For that, change the reader | |
1016 | to create string literals with scm_c_substring_read_only instead of | |
1017 | with scm_c_substring_copy. | |
1018 | */ | |
1019 | ||
3ee86942 | 1020 | int |
fe78c51a | 1021 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
1022 | { |
1023 | scm_c_issue_deprecation_warning | |
1024 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
1025 | ||
2616f0e0 | 1026 | return scm_is_string (str); |
3ee86942 MV |
1027 | } |
1028 | ||
1029 | char * | |
fe78c51a | 1030 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
1031 | { |
1032 | char *chars; | |
1033 | ||
1034 | scm_c_issue_deprecation_warning | |
1035 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
1036 | ||
2616f0e0 MV |
1037 | /* We don't accept shared substrings here since they are not |
1038 | null-terminated. | |
1039 | */ | |
1040 | if (IS_SH_STRING (str)) | |
1041 | scm_misc_error (NULL, | |
1042 | "SCM_STRING_CHARS does not work with shared substrings.", | |
1043 | SCM_EOL); | |
1044 | ||
556d75db MV |
1045 | /* We explicitely test for read-only strings to produce a better |
1046 | error message. | |
1047 | */ | |
1048 | ||
1049 | if (IS_RO_STRING (str)) | |
1050 | scm_misc_error (NULL, | |
1051 | "SCM_STRING_CHARS does not work with read-only strings.", | |
1052 | SCM_EOL); | |
1053 | ||
2616f0e0 | 1054 | /* The following is still wrong, of course... |
3ee86942 MV |
1055 | */ |
1056 | chars = scm_i_string_writable_chars (str); | |
1057 | scm_i_string_stop_writing (); | |
1058 | return chars; | |
1059 | } | |
1060 | ||
1061 | size_t | |
fe78c51a | 1062 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
1063 | { |
1064 | scm_c_issue_deprecation_warning | |
1065 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
1066 | return scm_c_string_length (str); | |
1067 | } | |
1068 | ||
1069 | #endif | |
1070 | ||
0f2d19dd JB |
1071 | void |
1072 | scm_init_strings () | |
0f2d19dd | 1073 | { |
3ee86942 | 1074 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 1075 | |
a0599745 | 1076 | #include "libguile/strings.x" |
0f2d19dd JB |
1077 | } |
1078 | ||
89e00824 ML |
1079 | |
1080 | /* | |
1081 | Local Variables: | |
1082 | c-file-style: "gnu" | |
1083 | End: | |
1084 | */ |